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.\" $Id: curs_inchstr.3x,v 1.45 2024/04/20 21:20:07 tom Exp $
.TH inchstr 3NCURSES 2024-04-20 "ncurses 6.5" "Library calls"
.ie \n(.g \{\
.ds `` \(lq
.ds '' \(rq
.\}
.el \{\
.ie t .ds `` ``
.el   .ds `` ""
.ie t .ds '' ''
.el   .ds '' ""
.\}
.
.de bP
.ie n  .IP \(bu 4
.el    .IP \(bu 2
..
.SH NAME
\fB\%inchstr\fP,
\fB\%inchnstr\fP,
\fB\%winchstr\fP,
\fB\%winchnstr\fP,
\fB\%mvinchstr\fP,
\fB\%mvinchnstr\fP,
\fB\%mvwinchstr\fP,
\fB\%mvwinchnstr\fP \-
get a \fIcurses\fR character string from a window
.SH SYNOPSIS
.nf
\fB#include <curses.h>
.PP
\fBint inchstr(chtype *\fIchstr\fP);
\fBint inchnstr(chtype *\fIchstr\fP, int \fIn\fP);
\fBint winchstr(WINDOW *\fIwin\fP, chtype *\fIchstr\fP);
\fBint winchnstr(WINDOW *\fIwin\fP, chtype *\fIchstr\fP, int \fIn\fP);
.PP
\fBint mvinchstr(int \fIy\fP, int \fIx\fP, chtype *\fIchstr\fP);
\fBint mvinchnstr(int \fIy\fP, int \fIx\fP, chtype *\fIchstr\fP, int \fIn\fP);
\fBint mvwinchstr(WINDOW *\fIwin\fP, int \fIy\fP, int \fIx\fP, chtype *\fIchstr\fP);
\fBint mvwinchnstr(WINDOW *\fIwin\fP, int \fIy\fP, int \fIx\fP, chtype *\fIchstr\fP, int \fIn\fP);
.fi
.SH DESCRIPTION
These routines return a NULL-terminated array of \fBchtype\fP quantities,
starting at the current cursor position in the named window and ending at the
right margin of the window.
.PP
The four functions with \fIn\fP as the last argument, return
a leading substring at most \fIn\fP characters long
(exclusive of the trailing (chtype)0).
Transfer stops at the end of the current line, or when \fIn\fP characters have
been stored at the location referenced by \fIchstr\fP.
.PP
Constants defined in \fB<curses.h>\fP can be used with the \fB&\fP (logical
AND) operator to extract the character or the attribute alone from any position
in the \fIchstr\fP [see \fB\%inch\fP(3NCURSES)].
.SH RETURN VALUE
All routines return the integer \fBERR\fP upon failure and an integer value
other than \fBERR\fP upon successful completion (the number of characters
retrieved, exclusive of the trailing 0).
.PP
X/Open Curses defines no error conditions.
This implementation returns an error
.bP
if the \fIwin\fP parameter is null or
.bP
if the \fIchstr\fP parameter is null.
.PP
Functions prefixed with \*(``mv\*('' first perform cursor movement and
fail if the position
.RI ( y ,
.IR x )
is outside the window boundaries.
.SH NOTES
All routines except \fBwinchnstr\fP may be macros.
.PP
SVr4 does not
document whether the result string is zero-terminated; it does not document
whether a length limit argument includes any trailing 0; and it does not
document the meaning of the return value.
.PP
Reading a line that overflows the array pointed to by
\fIchstr\fP
with
\fBinchstr\fP,
\fBmvinchstr\fP,
\fBmvwinchstr\fP
or
\fBwinchstr\fP
causes undefined results.
Therefore, the use of
\fBinchnstr\fP,
\fBmvinchnstr\fP,
\fBmvwinchnstr\fP, or
\fBwinchnstr\fP
is recommended.
.SH PORTABILITY
These functions are described in X/Open Curses, Issue 4.
It is no
more specific than the SVr4 documentation on the trailing 0.
It does specify
that the successful return of the functions is \fBOK\fP.
.SH SEE ALSO
\fB\%ncurses\fP(3NCURSES),
\fB\%inch\fP(3NCURSES),
\fB\%inwstr\fP(3NCURSES),
\fB\%in_wchstr\fP(3NCURSES)
